[aerohead]

Perhaps their claim is a contextual remark based on a particular market segment of crossover SUVs based on length,height,width,and curb weight at the time of press release.
Certainly,all their effort was to chip away at a hard design and quit at some point at which time diminishing returns were devouring their budget.
If we look at their market competition it would give a contrast to their remarks.
The upshot is that Daimler-Benz thinks aerodynamics a market 'driver'.If so,that's a good thing,as the level of general consumer education may be dragged to new levels along with the hyperbole.